Hmmm....what a luxury - to be able to say 'Ho Hum, yet another Furawatchi....how boring....!'
Perhaps you need to let the poo stack up and the Hungry / Happy hearts empty more than twice to get a different character.
I am convinced that the way you care for your teen on the 3rd day (48-72hrs) has the greatest effect on the kind of adult you will get - but be careful you don't kill the teen.
I did that the other day, trying for a Gozarutchi - it's been so long since I have seen one....! I had the Oniotchi on 1 x Happy and 1 x Hungry heart - but got distracted with something else for an hour or so and I came back to see the egg, halo & wings....
Try keeping the teen at 2 Hearts full, 2 Hearts empty - both on Hungry and Happy and see what turns up...
Best, etc.
TamaMum